As you will see there are differing opinions relating to your question here. Strictly speaking if you carefully read the owners manual relating to warranty coverage you will note where the factory leaves itself huge leeway in what can be determined as "warranty covered" based upon what alterations have been made to any SS. There are members here with issues relating to denial of coverage based upon mods totally unrelated to their problem. On the other hand, as already noted, others have seen their dealers go to bat for them in order to have issues cared for. Best bet is to have a serious heart to heart with your dealer PRIOR to any but the most superficial of mods and get a good feeling about where you stand. Now having said all that, I have a CAI, shock upgrade and am preparing to add a 1320 header plus exhaust to mine and I take it in for all of the services/recalls to a dealer that was not the original seller but whom I already knew well enough to trust ( bought mine used from a private owner). Good luck!